Regulator



FIG. 1 is a front, top and right side perspective view of a regulator showing our new design;

FIG. 2 is a rear, bottom and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken lines shown in the figures are included for the purpose of illustrating portions of the regulator and form no part of the claimed design. 

CLAIM The ornamental design for a regulator, as shown and described. 